Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1995ROADMASTER ESTATE WAGONREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 5.7LECM/PCM CODE CHARTSCODE 37, TCC BRAKE SWITCH ERRORNOTES
1995 Buick Roadmaster Estate Wagon
Code 37, TCC Brake Switch Error: Notes
1995 Buick Roadmaster Estate WagonSECTION Notes
PCM monitors activity of the normally-closed brake switch. Switch opens when brake pedal is applied.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- Checks for voltage at brake switch.
- Simulates brake switch closed or brakes off.
- Checks TCC brake switch circuit between PCM and switch.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.